.container {
    width: 100%;
    height: auto;
    overflow-x: hidden;
    margin: 0 auto;
    background-color: #F8F8F8;
    color: black;

}
body{
    background-color: #F8F8F8;
}
/* 顶部导航栏 */
#header {
    position: fixed;
    width: 100%;
    height: 8rem;
    display: flex;
    line-height: 8rem;
    justify-content: space-between;
    background-color: #FF9326;
}

#header h1 {
    font-size: 2.25rem;
    color: white;
}

#header a:first-child {
    width: 10rem;
    height: 8rem;
    background: url(../images/header_one.png) no-repeat;
    background-size: 1rem 1.875rem;
    background-position: 40% 50%;
}
#header a:last-child {
    width: 8rem;
    height: 8rem;
    padding-right: 2rem;
    text-align: right;
    line-height: 10rem;
    font-size: 1.5rem;
    color: white;
}
/* 内容 */
.middle{
    width: 44.375rem;
    height: 70.625rem;
    border-radius: 1.25rem;
    padding-top: .0625rem;
    margin: 0 auto;
    margin-top: 9.875rem;
    background-color: white;
}
.middle h1{
    width: 10rem;
    height: 11.25rem;
    margin: 6.25rem auto;
    background: url(../images/login_logo.png) no-repeat;
    background-position: 50% 0%;
    background-size: 7.5rem 7.5rem;
    font-size: 1.75rem;
    color: #333333;
    text-align: center;
    line-height: 20rem;
}
.middle ul{
    width: 37.5rem;
    height: 25rem;
    margin: 0 auto;
}
.middle ul li{
    width: 37.375rem;
    height: 4.875rem;
    margin-top: 1.875rem;
    border-radius: .3125rem;
    border: solid .0625rem #DADADA;
    display: flex;
}
.middle ul li p{
    font-size: 1.75rem;
    line-height: 5rem;
    padding-left: 1.875rem;
}
.middle ul li input{
    width: 22rem;
    padding-left: 1.875rem;
    font-size: 1.75rem;
    color: black;
    outline-style: none;
    border: none;
}
.middle ul li input::placeholder{
    color: #dadada;
}
.middle ul li:nth-child(2) p{
    color: #ff9326;
    
}
.middle ul li:last-child{
    margin-top: 3.75rem;
}
.middle ul li:last-child input{
    width: 37.375rem;
    font-size: 1.75rem;
    color: #fffefe;
    text-align: center;
    line-height: 5rem;
    background-color: #DADADA;
}